Seeking advice on using an agent vs DIY for a retirement visa, coming from the US.

I was in Bangkok last month looking at neighborhoods and making plans to retire this November.

However, my company closed and I am now unexpectedly retired upon returning home. So now I have to move quickly, and a lot of work to do with clearing out my current home.

While I was still in Bangkok, I met in person with some legal services to learn more about what they provide. As I understand it, basically all documents go from me through them and they facilitate the applications. One quote was 14K baht for the 90 day non-immigrant O, 19K baht for the 1-year extension and 5K baht for opening a Thai bank account (Total 38K).

I have read a lot about the process to do it yourself, and I feel confident I could achieve it. The cost is not so much a concern as much as knowing everything will go smoothly - and the idea of avoiding long waits or delays due to form errors is appealing to me with so many other concerns about loose ends still in the US.

I would appreciate any advice from folks that used a service and whether you felt it was worth it, or if I might opt for one or 2 of the services while doing others myself, or if the process and potential for setbacks when doing it yourself is really a lot easier than we often see online accounts of.

Thanks