Should I accept a rental deal that requires extensive repairs and refurbishments for a house near Hua Hin?

Keep looking.

Keep looking or ask landlord for a 3 year lease

Keep looking

Use your gut feeling.

I'd keep looking, last thing you want is to leave yourself in a position where you've done up the house for them and then find yourself homeless after the first year. If you really want the house you could always try seeing if they'll give you a longer lease. I did something similar in the UK when I found out my Thai girlfriend was pregnant. I put my house up for considerably less rent per month but told the tenant they would be responsible for decorating repairs and furniture, the only difference is a signed a 5 year lease for her so she knew she wasn't being ripped off.

Keep looking

Another vote to keep looking….👀

Keep​ looking.

getting local professional to do repair works, is a pain in the *. very hard to get them to show up in any time table not set by their own inner (unclear) schedule.

I wouldn't put all that work into it for a 1 year lease. They're just getting you to do all the work they don't want to do and then after a year they'll kick you out and put the rent at the 55-70k you mentioned.

Unless you can get a lopsided lease where only you can end the lease with notice at the end of each year for at least 3 years, I wouldn't consider it.