I love my portable electric oil filled radiators and was inquiring if anyone knew of a domestic version that can be wall-mounted for permanency yet be plugged in to avoid rewiring.

Lower income properties tend to have more late payments, more bounced checks, more lease violations, more complaints about noise, parking, domestic violence, etc., and they have a higher turnover rate. 

Also, there are common domestic hot water tanks (gas paid by the owner), and a single gas meter so all tenants' cooking gas is paid by the owner as well.

After purchase I installed new flooring throughout, repainted the entire home, updated lighting to LED, updated master bathroom, replaced old furnace, air conditioner, and propane with a energy efficient geothermal system that heats, cools, and heats domestic hot water.

Does the current boiler also provide domestic HW?

That could be a real advantage.Options 3 and 4 don't provide HW, so that's something to consider if your current boiler is also providing domestic hot water.No matter what you choose, you may have to remove those old oil tanks.

There is an exception here and that is if that person is a fiance or domestic partner. 

This is from the Ohio Revised Code directly.Chapter 4735: REAL ESTATE BROKERS4735.01 Real estate broker definitions.As used in this chapter:(A) "Real estate broker" includes any person, partnership, association, limited liability company, limited liability partnership, or corporation, foreign or domestic, who for another, whether pursuant to a power of attorney or otherwise, and who for a fee, commission, or other valuable consideration, or with the intention, or in the expectation, or upon the promise of receiving or collecting a fee, commission, or other valuable consideration does any of the following:(1) Sells, exchanges, purchases, rents, or leases, or negotiates the sale, exchange, purchase, rental, or leasing of any real estate;(2) Offers, attempts, or agrees to negotiate the sale, exchange, purchase, rental, or leasing of any real estate;(3) Lists, or offers, attempts, or agrees to list, or auctions, or offers, attempts, or agrees to auction, any real estate;(4) Buys or offers to buy, sells or offers to sell, or otherwise deals in options on real estate;(5) Operates, manages, or rents, or offers or attempts to operate, manage, or rent, other than as custodian, caretaker, or janitor, any building or portions of buildings to the public as tenants;(6) Advertises or holds self out as engaged in the business of selling, exchanging, purchasing, renting, or leasing real estate;(7) Directs or assists in the procuring of prospects or the negotiation of any transaction, other than mortgage financing, which does or is calculated to result in the sale, exchange, leasing, or renting of any real estate;(8) Is engaged in the business of charging an advance fee or contracting for collection of a fee in connection with any contract whereby the broker undertakes primarily to promote the sale, exchange, purchase, rental, or leasing of real estate through its listing in a publication issued primarily for such purpose, or for referral of information concerning such real estate to brokers, or both, except that this division does not apply to a publisher of listings or compilations of sales of real estate by their owners;(9) Collects rental information for purposes of referring prospective tenants to rental units or locations of such units and charges the prospective tenants a fee.As for "Subject To" if you'd like my take I linked to a thread below that I started on that cesspool of a business model. 

So far we have been mostly buy and hold residential both domestic and international.Touch base me would love to chat about the area and learn more.Cindy 

Stick with the world gold standard in a Cook Islands Asset Protection Trust or the hybrid Domestic Component if you don't have a reason to go purely offshore with a connecting "migration" clause.