Any interruption of Tenant’s use and enjoyment of such appliances shall not constitute “constructive eviction,” nor form the basis for any defense, set-off or counter claim by Tenant.Tenant agrees to pay as additional rent an amount of no less than $200 per visit or the actual cost of service invoiced by a third party plus $50, whichever is greater, if a tenant-initiated service visit is performed and the request is deemed to be frivolous or without merit.Charges for service/repairs performed where the tenant has been determined to be liable/at-fault for such charges by [Landlord/PM] shall be due and payable in full upon the next rent due date as additional rent.No smoking is permitted on the premises, including outdoors within the property's limits.

I know who can use it, what I want to know is can a buyer use this as a tenant buyer on a lease option agreement to buy a home while their credit is being repaired for a yr or 2??

I think for what you are looking to do, I would probably suggest hiring help to assist your husband and keep that high quality of craftsmanship. 

Below is the math (all in % of house value):Rent: 12.0%Taxes: -2.8%Average Long-Term Maintenance & Repairs: -1.7%House Insurance & HOA: -1.6%Average Vacancy/FinderFees/Tenant Issues: -1.0%Property Management: -0.8%Total Average Annual Return: 4.1%I have heard landlords making 10% (no leverage) and 20-30% (with leverage). 

The theory was this would limit risk and lead to higher quality, longer term tenants that would be less likely to give me headaches. 

Then you’ll probably want to hire a general contractor to manage the repairs, unless you have someone local to manage it for you.

Mainly that ifyou will be limited to the amount of….Your purchase price + closing costs (costs when you purchased the home) OR....75% of the “After Repair Value”…WHICHEVER IS THE LOWER AMOUNT (super important)

Including repair cost what percent of market value should I purchase at. 

His quality of work is excellent! 

If you don't want the property demolished I would recommend calling code enforcement and having one of their inspectors look at the property to tell you what needs repaired so the home isn't demolished.