We did this for our last move, and it worked. The rental paid for itself plus cash every month.
A couple of questions you might want to ask yourself.
Can you afford to change out any of the following, because twice the equipment means twice the failures. Water heater, heat pump, toilet, range, refrigerator, dish washer, roof, plumbing, etc.
In the 4 years I've been a landlord I've replaced a dishwasher, roof, compressor drive board and air handler on the rental. Total spent was just over $5K, cash out of my pocket. Yes you get to deduct that from your income taxes, but it's still cash out of pocket. In that same time frame, I've also replace the refrigerator, condenser coil and water heater at my house and am fixing to drop $9K on a new roof. Bringing the grand total up to $18K including the roof.
Add to that, a Sunday morning changing the air handler, a Thursday night crawling around under the rental repairing a busted water line, a July Saturday replacing the screens over the gable vents in the attic, a cold Friday night loading up all my space heater to carry to the rental because the heat pump burned up a breaker.
Can you afford both house payments when the rental is empty. I have carried two mortgages for about 4 months and that Sucks.
Did I make money at it? Yes, the rental was a net gain.
Was it worth it? Not to me. I don't like the 5 pm phone calls about leaking pipes, animals in the attic, heat pump quit, no water, etc. If you don't have lots of cash, you are dropping everything to go fix it yourself. And tenants don't take care of stuff like you do, so crap will break and will need to be fixed ASAP.
I just sold the house.
Life is simpler, life is good.
I am by no means saying don't do it. It can be done and you can make money at it. I have a brother in law with 20+ rental units and he loves it. Be honest with yourself and realize, it's not all roses and can get expensive very fast. The Oh E36 M3 moment when the tenant calls because the heat pump died is not fun unless you have the cash in the bank to get it fixed.