Good day, If an investor has 10 rentals and wanted to over time sell them and put the money tax free from a 1031 toward a large purchase is there a process to do that?  Say they sold the properties over 3 year period ...

Once everyone understand the mechanics, and the results for all: they'll keep coming back to the table!

Full gut renovation, including but not limited to full replumb, full rewire, complete mechanical upgrades, and new apartment finishes from studs.

In tip top shape both in the mechanical systems, design, and upkeep2.

Opting for mid-grade materials will help stretch your budget.Structural/Mechanical: If the home needs a roof, HVAC, plumbing, or electrical work, that can take a big bite out of your $50k fast.

I am also doing a live in full renovation for a long term rental where I am project managing mechanical items and doing a lot of the interior renovations myself. 

What is your finance mechanism and terms?  

If millenial homeowners can't even change their home's air filters, or snake a toilet, or change the oil in their car, that's guaranteed future business for HVAC companies, plumbers, mechanics, and those places all need a place to conduct business in.The commercial mortgage pricing software I use has somewhere around 50 different asset classes in it.

There are never full photos of the mechanicals and basement and roof line so you will never have even a bare inkling of what the potential repairs will be.

For example, I have a subject property that has 1682 SF on the main floor and 810 SF of finished basement (the majority of which is about 8 feet in height with the exception of some bulkheads to hide the mechanicals) and 271 of semi-finished basement that is a utility room basically (washer/dryer, freezer, hot water heater, furnace, some storage).