Depending on what your goals and strengths are will greatly influence the best strategies you should employ.I agree with Ratho, Dave Van Horn has excellent info on non-performing notes.

Wholesaling using a double escrow is just one technique.You can use an option or an assignment.Is it unethical to deliver a solution to a seller who has a problem & you perform as promised?

Being able to perform complex math formulas won't mean you'll understand accounting, that's pretty much basic math.

An investor purchased it, performed a major rehab and sold it for $400,000 which was due to the fact that it is a high-value area in Fort Worth and the recently sold comps verified the market value of $400,000.

Think of it as playing poker and the mortgagee showed you his cards, after you folded.

If you have a corporation which allow you to deduct business expenses do you still have to go through the process of performing a 1031 exchange on your profits since purchasing another investment property is a business expense.

As an installment sale, the asset is owned by the seller until performance of the buyer is completed.

I know I need an accountant but have not found one I feel is a top performer.

Well, that wouldn't be an option it's a purchase agreement so I wouldn't go there as an option contract.Options can not have contingencies of any kind, especially based on performance of the optionee/buyer.The reason you have an option price in an option is for the right to purchase at a stated value based on the valuation made at the time of the option.

Example a buyer says they want multifamily but want a B asset in a B area fully performing at a 10 cap ( not going to happen as they trade in the high 7's nationally and maybe hit the 8's if your lucky ).