In your case, changing the property from a rental to your primary residence constitutes a change in use.The depreciation recapture will be calculated based on the fair market value of the building at the time of conversion, not including the land value.Since you're tearing down the existing structure, the entire amount of depreciation taken over the past two years will likely be recaptured, as the building's value at conversion will effectively be zero.The recaptured amount will be taxed as ordinary income, up to a maximum rate of 25% for residential rental property (Section 1250 property).

Nonetheless, you can base the DSCR calculation on PadSplit rent (if there's a history of PadSplit income being produced) or short-mid-term market rent (an analysis done at the same time of appraisal).

You have many people who say midwest markets are now appreciation markets, but I disagree with that statement.

Quote from @Samuel Hudson: Hello friends I am new the market and recently bought a home in Weehawken 6 months backs .Its a three family home and we are currently doing renovations Right now.The rent leveling board told me that two units would have to follow a rent of 1650 for unit 1 which has three bedrooms and another unknown amount for unit 2 which they don’t have the information for .The previous seller I purchased the property from bought it as a tax lien .He has kept the property vacant for two years with no tenants before selling it to me .However ,the previous Owner he bought it from must have had tenants .I am putting in a lot of money into renovations and want some clarity on the situation I am in .The property has been vacant for the two years and currently still is as we are doing renovation .It would be really appreciated if anyone can assist me on what information needs to be provided by from the previous seller for me to be able to set the rent based on the market value .Thank you . 

However, I'm having difficulty narrowing down a few markets, such as Tampa or Kissimmee/Orlando.

My lawyer suggests in a situation like this that I give them a notice that I am the new owner and that as of a certain date they owe market rent of $X,XXX.

In my area these are rare so they are difficult to set market rent, and I imagine get a lot of wear and tear with a lot of occupants living there. 

While this is a great and highly motivating goal, most people are either clueless or incorrect in their belief as to what is required to obtain this “lifestyle”.Understanding of the “how to” get there is further obscured by the misleading, and often patently false “pathways” sold by real estate educational MARKETING companies as workshops, upsold to association memberships, upsold to mentorships.

or market to Lenders for refi's ? 

The guru your son is learning this technique from is likely not telling your son that the deal will almost certainly encourage your son to get an "off-market" deal from a "wholesaler" who is unlikely to properly disclose the details of the property or encourage an inspection.