First Time Landlord, Continued Investment

[Jonathan Newcomb]

Greetings BiggerPockets Community! My wife and I just started a venture in North Texas, we were able to cash out some stocks late last year and put a down payment on a SFH in a north dallas suburb. We spent $45k down on a property at $162k, did a traditional loan at 4.65%. Our monthly payments are $907, but we are waiting for the homestead to fall off, so I am not sure what the true mortgage will be. We have a tenant currently under a 1 year lease paying $1400 / month. We have another set of stock options transitioning from RSU at the end of the year that will total about $35k. I have heard a lot about the strategy of doing a cash out refinance and using that to fund the next venture, but I am worried about getting under on the house. Should I take the RSU vestment and put that totally towards the down payment on another SFH, should I use that to reduce the principal on the rental or should I refinance the house (estimated value at $171k) and use the cash to finance another venture.