You are being taught a business lesson here by the market and instead of learning from it your trying to fight what you see as an injustice to the "quality" rehab you have done and those "evil" inspectors.
Renting a home is not the same as selling a home and especially a rehab home that has been extensively updated. I have personally been in the same boat as you selling new rehabs and have 12 rental units also. Here is what you can do to preemptively protect yourself when selling.
1. Hire the most reputable Home inspector that is well know and trusted/used by the best local realtors. Call these top realtors and ask for 2 names under the guise of wanting to get your house ready to sell. Get one of these companies to do an inspection of your home prior to listing it and fix every problem/issue he finds.
2. Repeat the above procedure and get a Roofing cert, chimney cert, HVAC, plumbing, electrical cert or statement of recent service and opionion of condition, etc for any other prefessional trade that might be an issue. Termite cert is also another thing that buyers lender will require.
The cost to get all these inspections and certs should only be $1500 max. vs you having to give away $3-5000 to some buyer that wants to nit pick your contract. Nit picking is a negotiating tactic that when understood correctly actually helps you close the deal. When someone isnt interested in your house t, they dont nit pick,they just walk away. Its not the inspectors fault when people back out. They are making a decision based on emotions and not always just the facts as you have learned.
This may not keep a potential buyer from hiring their own inspector but if you show them the report openly at their showing and then tell/show them that you have fixed anything on the report and on top of that provide them with your certifications there is a lot less chance of them getting squirrelly when something pops up on "their" inspectors report. Another cheap piece of mind for the newer buyer in the market who has been an apartment dweller their whole lives is to off to buy a 1-3 year Home warranty for them at settlement. Tons of companies sell them and they are reasonable priced for you vs loosing multiple potential sales.
Now go sell that thing and control the situation instead of falling victim to it.