Keep in mind that all this is for the "You Got To Fight For Him" path.
I have only played 1 time for the other 2 paths so I am not that good for them.
Starting day 1 you must ask mom for money every chance you get each day and then choose the first option that has sorry in it and keep doing this for the first 10 days or so until you have to start fighting Erik, you should end up with enough money to buy all the clothe items plus the books. Once you start make more money from the cam's then you can slow down asking mom for money. Keep blackmailing your sister for money every chance you get until you start having a good nest egg to work with then you can start doing the other options if you want to. You get some money each time you ask and each job you do for mom you get more money, once a week keep the money for 1 food order ya you might get spanked for it but do it.
Just remember you must have 300 to pay Erik for another week.
Don't buy the candies until later when you start to have extra money.
Don't worry about getting spanked you must peep every chance you get to build up your stats.
Do not use the photo until you must do so and do not give him his wallet back. Get that pic as soon as you can, it can save you only once though so pick the best point to show to Eric.
Keep in the back of your mind that you are doing all this to save your family using the tools at hand.
Every monday (I do it at 6 am) you need to pay at least 50 for adds and once you start building up some cash pay 100 every monday for adds. Make sure you keep 300 to pay Erik each week.
I know it sucks but stay on Erick good side until he finds out you are training Lisa and this is when you put your foot down.
The second cam should go to the pool it will gen up more money during the early stages of the game.
Your 3rd cam if you have really started Lisa's training in that Aunt is now your teacher then put that cam in your room and have aunt come there as often as you can and have Lisa give you a HJ during each homework you help her with, if not then put it in mom's room. If you have extra money put 50 or 100 on adds on thursday to but this in not a must but you will get your money back at least 2 times over and as high as 4 times what you spent. Don't spend more than 100 for adds when you buy them until you get rid of Erik then only go up to 200 any more than that does not seem to help or at least to me it seems that way.
If you want to know my thoughts on the family read post 114 here
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Remember that you only have so many tools to keep Erik at bay and some of them are not tasteful but do them anyway, ever chance you get for any chance for sex do it. Send Lisa every time to see mom and Erik, ya she gains some for Erik but 1 homework you help her with takes it away. You might not be able to keep Alice below 50% but you should be able to keep Lisa and aunt way down. I am able to keep Lisa at 0 most of the time and aunt about 20.
I do not worry about authority in that you do not need it until later but you can get your sisters spank every time you do to keep it as high as possible. Do not get Lisa spanked until after the first 10 days, help her every night with homework either by the
"no problem" (the no problem is bugged and you can not go very far in training Lisa so if you have that then you should start over.) or you do it for her do not get her spanked. Do those dishes both times a day for now once you start gen up good money then you can stop the dishes for Alice just keep an eye on Erik's authority over her and try to keep it below 50%. If the authority level is above 50% for 2 with mom at 100% for a week you lose.
I know a lot of this is a bitch to do but you only have so many tools to work with so use them as often as possible then you can start slowing down on some once you get into the groove and you should be ok.
There is a basic walkthrough here
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and every free time you have try to do something.