For lawn maintenance and snow removal I have $1,200/year,do you think this is sufficient?

Is there any letter I need to request from HOA (say commitment that they will clear this up) that could be sufficient for title company to agree to close 3.

Its called the self sufficiency rule.- you cannot use non occupant coborrower for income purposes or you may have to increase your down payment significantlyAs for other underwriting guidelines, its pretty much the same as any other FHA loan.If all units are occupied you'll need atleast one of the tenants to write a letter to state they intend to move out by the date of closing.

A home without an operable/sufficient heat source in the winter is considered uninhabitable. 

One contract with all owners is sufficient and I think the only way to do it.

If the cashflow and cahs on cash return is sufficient when including the HOA fees then I invest.   

That gives you sufficient leverage and gives us the opportunity to do the best we can for you to see that you are in good shape to exit our loan.

Excess amounts paid are considered a down payment and that can always be refunded in any court.Ohio recognizes the uniform commercial code, as do all states, there is nothing unique about Ohio with respect to types of contracts and now, this year, the IRS makes the determination of an installment sale or purchase contract at which point other agencies can then follow suit with applicable laws to the type of contract you may have.Using the words "Option", "Optionee" and "Optionor" are not sufficient to define your intent to sell, that comes from the amount of money paid, the term of the agreement, the price agreed, and the likely intent of the buyer to execute the agreement.

If $10k is sufficient enough capital to cover a down payment and other costs.

You'll need sufficient air space above the refrigerator too and sufficient space for the door swing.