After that's under control, focus on increasing income through additional work at your current job, taking on a side hustle, or finding ways to increase income on your existing rental.At the same time, educate yourself.

We currently have fixed interest rate at 2.85 on one home and 3.25% on the other 

Here is some FACTS to chew on, yes, from an immigrant household who has actual 1st hand current experience in immigration. 

👋I’m currently looking to invest in a single-family home in the Dallas area with a budget of $300K.

Are the properties you currently have cash flowing?

What's the current inventory in your market and are you competitive?  

Quote from @Victor Yang: If I gift a house, what amount will go towards the lifetime gift limit, the amount i purchased the house for, or the current FMV?

I am currently a student at Florida International University, studying International Business.

Local market trends: Could you share any insights into current rental market conditions and future growth projections for these areas?

After this 10 year period we plan to stop buying new properties and aim toward paying off current mortgages to help increase our cash flow in retirement.