homestudy question for relative adoption MS/TX

My family has the opportunity to adopt my niece's unborn baby. The baby is due in about 3 months. My husband and I have four children and have always wanted to adopt. We are thrilled about expanding our family and have no concerns financially. We are currently in MS and my niece who lived in the state just recently moved to Texas to be closer to her parents as the birth nears. Her parents (my much older siblings) and the rest of our family believe this adoption is the best scenario for our family. Everyone is on board. I have consulted with a lawyer in MS and the process for the adoption seems fairly easy and I was never told I needed a home study. Yesterday, I made an appointment with an attorney in TX but can't make it there until next month. The paralegal mentioned a home study, but wasn't forth coming about much else. I'm just looking for information about what the state of TX will require for this adoption to take place. I want to get started asap since the birth is so soon, and since the appointment with the attorney is a month away I'm afraid I won't have time to get everything done before the baby arrives. I want to know if anyone knows if a home study is required for relative adoptions in tx and since ms doesn't require one (or so I think) will I still need one if tx does? Also.... My husband is military and I am educated and have a fantastic well paying job. I work on a PRN status (as needed) and only work a few days a week and have the ability to work around my own schedule. We have debt (house, cars, student loans, and some credit card debt) but we can afford our bills and have enough left over for vacations, dance classes for our children, and the ridiculous amounts of groceries I buy on a weekly basis to feed us. :flower: I'm only concerned that before we had the opportunity to adopt we purchased a home about 3 months ago. Its only 3 bed rooms and our four daughters share rooms. (twins in one and younger two in another) The home is in an upscale neighborhood and we scarified square footage for luxury. (A deal we couldn't pass up) Before this adoption even was considered we met with a contractor to add a second floor to the home. We want our children to have their own room. Since we started this adoption process we have put those plans on hold until the spring. I'm worried we won't get approved by the home study because the baby (a little boy) will be in our room for the first year of life until we can add the addition. We have room for a crib, small dresser, and bassinet in the master bedroom. How does this process work. Can I show intent to increase our square footage or will we not be considered because the baby will not have a room available when he comes? Any help please. We are worried we won't be approved. We want this baby to stay in our family and my niece and her boyfriend just aren't ready to be parents.