It is possible the $300K house is over assessed and you may be able to appeal and get them lowered.

If they are it probably should be valued as a multi-family property since it will appeal primarily to investors.Is subdividing a potential option?  

Years ago, I read quite a bit about putting up bullet signs and doing short sales, but that honestly didn't appeal to me. 

As for a price to charge for the rent, I would again check the local market for rents and I would think you might be able to get a little higher price on your land because it appeals better to people because it is not in a park.As for selling to the home to the a buyer on payments.  

Personally I plan to have most of my after-tax investments in Real Estate since one of the appeals of Real Estate is the tax treatment. 

In order for them to be appealing to this specific market (city dwellers, deeper pockets, a specific design aesthetic), we could put in about $1k in cosmetic design-related improvements and about a week of work.

The best way to force appreciate a home is through renovations in the kitchen, curb appeal (front and back landscaping), bathrooms, paint (interior and exterior), and flooring.

From what I'm seeing, there are opportunities still available although but get to know the areas of town...some are clearly more appealing to buyers than others.

The following services are included: A physical walkthrough of the building to evaluate the potential presence of mold; Collection of tape lift samples of suspect mold and/or collection of air samples indoors and outdoors using slit-impactor Zefon cassettes, then submission of those samples for laboratory analysis; Temperature and humidity testing; Moisture testing using an infrared camera and pin-contact moisture meter; Collection of bulk asbestos survey samples of suspect materials which the consultant  feels will need to be disturbed to perform mold remediation work ;Testing of paint (per-1978 buildings only) and ceramic tile which the consultant feels will need to be disturbed to perform mold remediation work with an X-Ray Fluorescence machine; Photographs of the subject property and of situations or materials of note with regard to mold; Preparation of a formal report containing photographs, conclusions, recommendations, and laboratory report(s).

ARV $105,000 reflects the needed repairs to enhance the property condition and appeal to standard market.