Having the info will help you weigh the options and make an informed decision.

Just trying to see what is the best option. 

LLCs tend to be beneficial for financing options if using hard money as it can be required depending on the program.

Hard money lender/DSCR - both are good options.

I know there are a lot of options, especially since they are family and willing to carry the loan. 

.- Suggest you try to network with other landlords in your area, check MeetUp app and others.Your other option is to hire an attorney, but understand you will have to pay them for your ignorance.

If a HELOC isn't an option due to Texas laws, you could consider a cash-out refinance with another property or a portfolio loan, even if you want to keep your current rate.

Alternatives include seller financing, a lease option, or using an LLC or trust to structure the deal while maintaining tax benefits.

If you want to develop it, I can refer you a lender that will lend on a completed subject to appraisal but you'll be limited if you just want it for the lot.If you simply want the land as part of your property, you have more options including a HELOC which you can still use for development down the road. 

So before dismissing your options, you may want to consult an investor friendly Lender who is an out of the box thinker.