Hi
Lust&Passion , how are you?
What's the problem with that? Every big TV show hire different directors for different chapters and you can't tell the difference of quality between one episode and another in terms of visual aspects. There are even second directors too, who film scenes by their own in the same chapter. Every respectable animation studio has different animators and you can't tell the difference between one drawing and another. Avatar, one of the most successful movies, had like 1000 visual artists. Stephen King has a lot of his stories told in movies by others.
There are even people in the Fan Art Thread that can match your quality, look:
Renders by
gkdanuka
But surely there are more devs that can match it too.
You can deliver the secondary scenes to someone else and you still will do the most relevant ones, those that involves seduction, lewd content and animations. You can do the experiment without losing nothing: tell somebody that you are planning to hire a person but he should do a trial period first. You send the script of one scene to the artist you chose, while you work normally in the game in other scenes. Then, days after, you recieve the scene completed. If you don't like the work, you say sorry and you don't hire him. You continue working alone as always and you have lost nothing. But if you like his work, you will reduce the development time. There are a lot of people who create fan arts just for fun and spend a lot of time in it.
Also, there are many potential patrons that you are losing because of the slow development. Games similar in popularity as yours have two or three times more patrons. A game with a huge popularity like this one could have had more than 3000 patrons by now. An asistant would be a good investment.