I looked up the law firm (their web address is listed in the filings). This appears to be a small firm and real estate law is listed first on their list of things they do. On their website, they talk about controlling the costs of litigation, so it appears they do not do a lot of contingency cases. I found it interesting that Gabby's family didn't go with one of the big firms that advertise heavily. Maybe they have experience with this firm, or maybe the big boys didn't see profit in this.
Florida tends to be plaintiff friendly in court, but Florida law also can make it hard to collect (There is a reason OJ Simpson moved to Florida after losing his civil case.) Many Florida physician's do not carry malpractice insurance since many assets can be protected. This frequently involves putting assets in a spouses name which wouldn't be applicable here since both are sued.
I wonder if there are enough seizable assets to make a lawsuit profitable for a trial lawyer to take the case on contingency. Is their real estate portfolio highly leveraged? Did their primary business survive the COVID shutdown? I did read an article a while back linked here that pointed out that another son, who has no relation to this case of which I am aware, runs the previous business in New York - do the parent's have an ownership interest in that? It has been reported that when the L's bought the camper, that the check bounced, but they did make it good. If the L's don't have a lot of assets, then all parties will likely have to pay their own expenses, and a long lawsuit could bankrupt all three families.
My gut feeling is that after the initial round of filings is over, the lawyers will speak and try to make a deal. Even if this case is not thrown out, the L's can pretty much say anything they want at a deposition. Unless there are some third-party witnesses of which we don't know, there would not be much the plaintiff's lawyer could do to undermine their testimony. Depositions are schedule long in advance and they would have time to prepare.