Do they have air conditioned apartments with internet in each bedroom in Chiang Mai?

If so, how good is the connection and how much do they charge (appox)

If not, are most apartment owners usually ok about tenants getting it connected through phone companies. I would be willing to get it all sorted myself and paying the bill myself.

Also does your electricity bill work out much cheaper (per unit) if I live in a house compared to an apartment? If it is too troublesome to find an apartment with internet I may rent a house and get connected (I imagine it will be easier)

If you are going to do it yourself you have to make sure the telephone line is direct, not through the switchboard.

In the case of the house or apartment you will need to check that adsl is available in that area.

Condos tend to load the electricity prices.

See this link for more details.