I need to go to Bang Kadi Industrial Estate from Thonglor. Is a taxi possible or is it better to catch one from a MRT or BTS station?

tonglor= golden wheel, thus the HiSo people from there would be seriously below status level to even think of BTS. Maybe a hired black Mercedes with RedBUll signs and killing the odd police mon the way?

That estate is NORTH of Rangsit- a TRAIN from HuaLampong would be best choice-if times fit and you can stand the utmost hoorible idea of 3d cl nonAC wooden seats. ^ bt till Rangsit-some in the peaks even stop right beside that estate.

Taxi: nearest BTS -or MRT is of course the Mochi-but then its till some 30+ kms- can partly go via expressway2.t

Depends on where you are on Thong Lor, if close to BTS, get skytrain to stop before Mor Chit, then a taxi.

If at Petchaburi end, just get a taxi, less than one hour if Somchai knows where he is going, different routes available, depends on where you start.