Should I converted the basement in-law suite as the 2nd unit?

So I have a home in Brooklyn, NY that is worth a lot. A little over seven figures. It's a small home but I'm thinking of renovating the top two floors as a single unit. It would be a 3 Bedroom / 2 Bathroom will a park...

While you're doing that you should also also check if any permits were pulled to convert it from a bedroom to the loft.

A side note is that I am hoping to do this with my SOLO401K, and likely convert over to ROTH also.

It would be interest only during the rehab period, and then convert into a 30 yr fixed at a low interest rate.

A lot of apartment units in Los Angeles have been taken offline recently (either to be converted to condos or to be demolished for a new development project).

Since this property hasn't been fully converted to a multi family, you may want to run the comps as a sfr.Spitting the utilities (if they aren't separated) may not go as smoothly as you expect.A single thermostat that controls both units is probably not going to go over very well.

Does anyone have experience or knowledge about converting two vacant rent stabilized apartments into 1 large apartment. 

After 1 year you paying off the CC, this will be converted to unsecured cc and you will have your money released.We also have CC on the company name but this doesnt help with your personal credit building.Best is you get 2 or 3 lines of credit asap (credit cards, car loans, purchasing items like appliances on credit and paying of in time...this will build your credit. 

Then they my use Roth backdoor  policy to convert IRAs to Roth .