Is their any harm in waiting until Dad loses his leg, goes into a skilled nursing facility, and at that time applying for Medicaid?

My Dad had his Angiogram last week and there is nothing further they can do to save his leg. So now it's a waiting game until it has to come off. He already has one prosthetic leg, and has never come off the walker since losing that leg in 2015. If you remember me, my Mom met with the only Elder Care Attorney in her area last month, and their fee for Life Care Planning is $14,000 (that covers their services for one year), and $3,900 for years 2-5, if she wanted to keep them on. This is in Johnson City, TN. I am in Indiana. She told them the other day that she is only interested in them filing the Medicaid application and putting her house in the FAPT trust, not the whole "Life Care Planning". They said that is fine, but it will still cost $14,000 to retain them. Also, they want to start the application process right away, which as you know would also mean the "spend down" part of it. They would have to spend down $110,000, plus sell their 2nd vehicle that mom uses a lot.

So my question is, shouldn't my mom just wait until it's time for that leg to come off, to start the Medicaid application process? Or maybe the house needs to be in a trust before then? She plans to sell the house once dad is in LTC facility, which this attorney told her she could, even with it in that trust. She is really between a rock and a hard place. That fee is absurd!! But what else can she do? She cannot drive to Nashville, where there is another ELA, or to Asheville, NC. They will both be 75, this month and next month. It gives me anxiety trying to figure out what to tell her, how to help her with this. Plus, is there a chance he would be turned down for Medicaid LTC? And with that, she would be out the $14,000 fee. By the way, their only income is SS. This is crazy and scary!