For plumbing/HVAC I use Mat's Mechanical exclusively (water heaters, furnace trouble shooting, etc). 

The cost to remove them, redo the sub floor, new tubs, plumbing and tile work does not appeal to me.

The day after I closed I had a few contractors come out and a few days later work began on the plumbing and bathroom remodel.

These have been large scale renovations with layout modifications, new electrical, mostly new plumbing, etc as well as a mid higher end finish (quartz counters, marble tile, etc).I'm looking for a benchmark, particularly on timeline.

Electrical, plumbing, insulation, drywall, flooring, kitchens, and baths will be completed by myself.  

Matt, a best guess would be 15-30% primarily due to labor supply and ever increasing regulations.  

I'm not sure who regulated MH's in Texas but that's probably the best place to start before spending $$$ on an attorney.

@Stephen McLaindepends on what's in your lease and local landlord / tenant regulations.

Plan about $9K in repairs up front for new carpets or floors, paint, 6 appliances, hot water heater, plumbing leaks, and to fix whatever else was broken.Also, if you are planning FHA financing please beware that many of the foreclosures will not qualify due to disrepair.  

You would have to check local zoning laws for security and privacy, California is known for some out there regulations – like scent free areas…Good luck!