Without any cash it is unlikely unless you can find a 100% seller financed deal (they do exist, I just did one a few months ago).

You want to make sure they are at or below 5% to make sure they are able to stay solvent.

Every REI has a starting point, a build up phase, and an exit phase (this doesn't have to mean out of REI...it refers to cash).The key to determining this is based on an investment plan, and where the REI is in that plan. 

@Michelle Hardy, I don't understand the once per month strategy for open houses.

I've heard of the Red Stick group although I was not aware of their monthly meet ups thanks for the insight. 

Welcome to BiggerPockets, Richard! 

If the property is vacant, you will attract a larger pool of buyers as not everyone looking for a house wants to use it as a rental. 

Is there a quick way to estimate what those other costs will be monthly to make sure my calculations are accurate?

Monthly costs are about 2k/month including fire insurance (high risk area).

Currently have a duplex I’ve been in 3 yearsMortgage 3.65% pmt $850Tenant pays $875Heloc $30k——monthly $291The issue I am running into isRates are so high right now and it’s a lot harder to find another that will cover full mortgage.Does it make sense to leave somewhere that it is full covered to go to one that is not?