I used to live in this duplex and I moved out to convert it to 100% rental and refinanced.

I can likely convert one of the four 1 bedrooms to a 3 which will stay on the main heat source for the interim.  

Can you convert it back to an Airbnb for additional income and use the proposed rents to offset the mortgage so you can buy your new home? 

I was going to go with "High net worth individuals (HNWIs) are those who have at least $1 million in easily convertible assets like cash, stocks, and bonds."

We have found homes that have basements converted into apartments, which we could rent out for income and have also found duplexes with one unit occupied.

Sure, it just came available and it isn't the best area but livable. 5 bedroom, 4 bath converted 4-plex that is over 2700 sqft.

With that being said even if we were able to find an attractive refinance opportunity, would it even be worth it when factoring in all the fees associated with converting it?

I would call this a one-and-a-half plex. it is a converted single-family home.

It was being used as a single-family home and we converted it to 3 units.

We converted a big sale that saved almost seven figures in taxes, I wanted to buy them a Caribbean cruise after that one and felt like it was still worth the money it was very much a dollars and cents thing.