My question was this, to save time and money, is there a place I would be able to see if a previous soil test has been done, building plans, anything? 

Yes, you may lose some established snow birds by changing terms and prices, but if you are losing money you are better off without them.

Please be careful, at higher amounts leveraged, the carrying costs/time value of money can eat you alive if you have any hiccups in your project. 

We would mutually to remove aunt A through quitclaim deed but also don’t want to put ourselves at risk for a tax reassessment.

Wholesalers have such a bad reputation because many just go on mls, low ball offers and try and wholesale a deal on the MLS, or will get a deal from another wholesaler and mark it up and the investor has seen it from the original wholesaler and 3 other daisy chains.Key is to find your own deals, analyze them, and know the numbers to assist in finding deals for others and make some money.

I don’t want to assume too much risk, but I also want to have at least 8 houses by the time I’m 30.

@Cami GrantIf you start your first home by investing in land, you can earn it through the Internet, market research, education, networking, research, risk management, and goal setting.

Potential asterisk on pulling that money out of the S-Corporation.The benefit of not having real property in an S-Corporation is flexibility (don't have the same deemed gain rules if pulling it out of a partnership), basis in the debt (in your case you don't have any debt).You could still end up with some double tax on this. 

My tenant is complaining about the potential risk of a tree limb falling on them.

Using Hard Money 10% down 100% rehab loan to finance the deal.