The electrician can tell you about the code AND whether it is safe, regardless of what is required. 

They were mid-lease and asked to be released from their lease because they didn't feel safe.

We have 6 kids and the baby is the only one with elevated lead levels, although it is still considered in the "safe" range.

Obviously there comes a point where you can't cover all possible contingencies, but what amount would you recommend having set aside before getting in the game to play it safe?

@Juan BravoCheck out the people @Dennis Rodriguez mentions.If a bank won't be involved, make sure you do a title search ("Estudio de Titulo"), make sure property taxes are paid and I would get Title Insurance (just to be safe and it's cheap).I don't know about any specific problems/issues/concerns with the owner financing part.

You also have other issues with lease credits (many actually) as you'll have a sale contract and a financing arrangement and with a tenant buyer and the seller being in the business, violations of the SAFE and Dodd-Frank Acts.Lease-options just aren't the "go-to" contract they were several years ago, rent-to-own is pretty well dead and considered a`predatory lending matter as they were done in the past. 

This technique has brought up the bulk of my investor list- Go on linkedin and search for "Investors", "Real Estate Investors", "Rehabber" and all the likes related.

Economies of scale, diversifying against vacancy loss, and classic valuation techniques are all solid advantages to multi's as compared to singles.

The house is structurally sound and safe.  

Nothing is safe from Creditors.