So you're entire premise is built upon seller being dumb....Not to mention handing it over for near market value, with an amazing rate in place, and property condition being turn-key, and seller not having any hidden issues say an IRS tax lien or what not, and, and, and..... 

Is it possible to get better conditions like 20% down or less and 20 term.?

.- It's usually not that difficult to make the required repairs - unless the wholesaler & their PMC have misrepresented the condition of the property!

Avoid they want your property in new condition.

The value is increased by heated sqft, bedroom and bathroom count and property condition.

That is a very general question and each area has its own market conditions so what works well in one area may not in another.

As for returning the deposit if there was clean up, hopefully you took photos of the condition of the home once it was vacant and have an itemized bill to present the former tenant. 

Your numbers are simply not worth the paper they're printed on if you really need to rely on a home inspector to tell you about the property's build quality and condition.

One key lesson learned from the Stowers Road project is the importance of thorough market research to ensure that renovations align with buyer expectations and local market conditions.

Roof and HVAC are in good condition.