WELCOME TO THAILAND
Siam Real Estate & Siam Villa Rentals would like to welcome you to Thailand. We hope you and your family will really enjoy this wonderful opportunity to experience life in one of the most beautiful countries in the world. Whether you are moving here for retirement, spending time or working there are [...]

What is the  The Non-Immigrant Visa  “O-A” (Long Stay) Visa
The Non-Immigrant Visa  “O-A” (Long Stay) is a visa for people that are aged 50 years and more who wish to stay in Thailand for a period of not exceeding 1 year without the intention of working.
Employment of any kind when you hold a Visa [...]

Section 37(5) of the Immigration Act B.E is anorther disposition that gets a lot of foreign citizens in trouble. To sum it up it requires that any foreigner who is permitted to stay in Thailand temporarily is required to report to the Immigration Department to confirm his/her residential address upon completion of [...]

Foreign investors who wish to come into Thailand to conduct a business or to work must first obtain a Non Immigrant Visa B with a Royal Thai Embassy.
The Non Immigrant Visa B will allow you to stay in Thailand for a period of not more than 90 days at a time. [...]

Extending a Non Immigrant Visa B for one year
A foreign investor conducting a business in Thailand or working for a Thai company may if all conditions and documentary requirements are fulfilled file an application and obtain a one year visa.
Condition and Documentary Requirements
A foreign investor may apply for a one year [...]

Here is a comprehensive document covering general costs, tax rates, labour costs, utility, communication, transportation costs, misc costs and useful information in fact everything you need to know when considering starting an operation or business in Thailand.
Download pdf document Thailand costs_doing_business_2009
Courtesy of www.thailaws.com

STOP PRESS:
All foreigners who apply for Tourist Visa at the Royal Thai Embassies and the Royal Thai Consulates-General worldwide, including eligible foreigners who apply for Visa on Arrival at designated checkpoints, will be exempted from Tourist Visa fee from  11  May B.E. 2553 (2010) to 31 March B.E. 2554 (2011).  Such arrangement [...]