because it's not totally legal and she said old companies seem to be fine but setting up new ones just for house purchase they are being scrutinized more.
Definitely speak to a lawyer . I bought a house 2 ISH years ago and my lawyer said they would set me up a company if I really wanted too, but strongly recommend I didn't go that way .
should be fine . I registered my first bike to a hotel in Chiang Mai on a tourist visa .
If you buy off a dealer they should help with registration ( for a cost) or private you can go to the DLT office yourself or most used car/ bike dealers will do it for you for a fee even if you didn't buy it from them .
If you have the money don't use an agent . You need to provide the same bits of paperwork for either so do it yourself and save a ton of money . Immigration are very helpful.