Spend the money, do it right: seamless L grade (NOT M) copper pipe.

I wouldn't touch your 1st mortgage unless the blended rate (Both the 1st and 2nd Position loan rate) is higher than a traditional cash out refi. 

Ultimate goal is obviously to build cashflow as seamlessly as possible and pay down debts of houses as we go so husband can leave his consulting job and we can do real estate full time.

You should always make sure to work with someone boots on the ground who has good relationships with the city so they can make the onboarding process seamless.

This makes mobile home parks a smart, resilient investment choice.For those willing to look beyond the traditional property investments, mobile home parks offer the perfect blend of low risk, low maintenance, and strong returns—a true hidden gem in real estate.

Your blended rate will likely reduce with each payment as well. 

In addition, targeted searches for "apartments 77008" and "greater heights apartments" have lower competition which provides a great opportunity for organic and lower cost of acquisition.Household Composition: 77008 shows balanced demand for both family-oriented housing and non-family units, promoting investments in single-family homes and high-quality apartments. 77063 indicates higher demand for rental units and smaller homes, focusing on apartments and affordable housing options.Despite higher entry costs and a lower percentage of renter-occupied units, 77008 appears to offer better prospects for appreciation and lower vacancy rates, making it a more suitable choice for investment.Greater Heights OverviewThe Greater Heights area (77008), often referred to as "The Heights," is renowned for its prime location offering a blend of amenities, top-rated schools, and abundant job opportunities.

Not all but most times.Not this topic but in general I have seen offerings from other syndicators where they put in marketing the pref is a high number like a 7 but then say blended return with the asterisk.

So, they make the process of being an investor seamless and you having to do nothing as they after you closing turn into you management company with a standard 10% management fee (which I am okay with). 

(Most Likely Double Digits)Your blended rate will be extremely comparable.