I am looking to come to Thailand (Hua Hin) for 2-3 months on a US passport to see if I then want to return to live. I will rent a condo or Villa. My question is I am a consultant so work from home but do travel fairly often to visit clients and do seminars. So, during my 2-3 month stay I would likely travel in and out of Thailand 4-5 times (Hong Kong, Dubai, Vietnam, etc.). Is this going to cause me potential problems with immigration. Thoughts and recommendations appreciated.

90 days reporting for O-A (retirement) visa: Is this reporting required even one leaves the country within 90 days, or reporting must be done regardless of traveling in/out of the country? When reporting required, reporting by 'mail' seems to be a very practical/simple option?