Use the money on a better investment. If that means retaking the LSAT and paying sticker at a T50, that's a MUCH better investment than a TTT.
I don't see how OP is going to get into a T50 with a 2.61. OP, if you really think you have an understanding of what you would do as a lawyer and you are set on it, would you consider expanding your area to a school like WVU? Even for non-residents, that school is very cheap and I think it would give you more options, even if it means waiting a year and improving your LSAT a little. Even if you don't want to work in a city like Richmond, etc and want to work in a small town firm, or in local/state gov't or something like that, I have a feeling it might give you more choices. I mean, if you are one of the top 10 in your class or so, you might even be able to clerk for a district judge in WV or W.D. Va.
I have a 2.9 and I got into GMU, AU, and GWU. A 2.6 is admittedly worse, but I think a strong LSAT goes a long way to balancing that out. Also some softs can help convince them of your new work ethic. For example WE, graduate studies, etc.
Granted my 2.9 is a hard science and engr dual major, and I have a graduate hard science degree from an ivy, and I managed a 169.
OP, invest your 200k somewhere. I don't know shit about investing money, but I'm sure you could find some solid free advice online. There's gotta be a better return on a 200k investment out there than a TTT. Take out a few thousand dollars and pay for the intensive LSAT prep courses, and take them really seriously. Bump your LSAT up to 165 or, even better, 170 and that 200k will go a bit further in LS.