DST or other mechanism

[Michael Overall]

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 and could not sell the rentals together as a portfolio.

Could they put the money from each sale into a DST then use the total to buy a expensive rental property?

Is there a way to use a 1031 over time to sell rentals and use the tax deferred money to buy a larger purchase?

Thanks