Mark Gee suggest you call the local oil companies and see if they can tell you if they've done an oil delivery or tank sweep at that address.

Misappropriation of security deposits is punishable by jail time and a fine.Here is what the Oklahoma statute says about returning deposits:"Upon termination of the tenancy, any security deposit held by the landlord may be applied to the payment of accrued rent and the amount of damages which the landlord has suffered by reason of the tenant’s noncompliance with this act and the rental agreement, all as itemized by the landlord in a written statement delivered by mail to be by return receipt requested and to be signed for by any person of statutory service age at such address or in person to the tenant if he can reasonably be found.

I don't send reminders but the best thing I ever did was buy custom printed bill pay envelopes that have my mailing address on them. 

And if so, how did you address any threat of the due on sale clause?

I have seen people purchase homes and were very surprised when it is in floodzones, not approved for the number of units it was listed as, and even that it was not in the City they thought it was in (we have properties that have a different city as their address, but fall under a different planning authority/city boundary).

@Tony Mayo Just to address a couple of your questions and discuss strategy, a great way to borrow funds (from any source) is to find a property that is either under market value, or can be improved therefore raising its value in a short amount of time (forced apprecaition) and then, say 6 or 12 months later (there are rules on how quickly you can Refi), you can then refi it at the higher value.

But that way you can address the unlevel floor and also not have to worry about the new floor have weak spots or any movement due to a situation where you have finished floor over finished floor.

There are far too many things to address here so I'll end with this: if you have not purchased before, educate yourself using sources other than the person trying to sell you something.

If you need any help give me a call I'd gladly address your problem. (915)256-37-60

The article should address apartment demand along with single family.