If there really is mold there then you want to eradicate the mold in whatever way a professional directs you to. 

I grew up in the south, you don't eradicate bugs, you take away incentive for them to come inside.

Based on a 2,000-calorie diet, the human body generates about 330 BTUs per hour of heat.

I'd contact a mold eradication company in FL and talk about possible max cost to eradicate, and if they guarantee the work, etc. 

It's practically impossible to install a grab bar in this bathroom without a complete remodel, but a handicapped toilet should just barely fit.Of course, it's hard to know during a rehab that one property might attract obese tenants, so pre-installing a toilet just for that reason doesn't make a lot of sense unless the property is near a diet facility. 

Jane Doe brought bedbugs into the building so around July 2014 the owner had to pay $1,400 to eradicate the problem.The tenant paid rent of $650 until September 2014 then in October 2014 only paid $600.

I have a marginal tenant in a class c property who has just informed me that his single family detached house is infested with bedbugs, and it is going to take thousands of $$$ to get them eradicated.

You must be extremely aggressive in identifying and eradicating these.

Who knows.If your tenant fights you, depending on your state laws, you probably won't win any case saying the tenant has to pay for the eradication. 

If you are asking about the investment strategy of tracking down owners of overbid funds, claiming the money, and splitting it, that entire strategy was eradicated by a series of Supreme Court decisions and legislative changes.