nin, I would suggest you are worrying too much about surveys.
Your conveyancing solicitor will offer a range of relevant surveys depending on what and where you are buying. They will (should) also give you a price for each survey.
My land was my 1st 'land' purchase also and my solicitor sent me a range of survey options: I rejected several suggested surveys as being a waste of money for my bit of land. I recollect, for example, rejecting utilities survey and the mining/China Clay operations survey: I already knew what utilities were available/installed across my fairly "remote" bit of land and I knew from web searches that my bit of land might, in very distant future, be sequestered for Imerys' china clay operations - as I said to solicitor, I'll be very old by time Imerys turn up demanding I sell them my land (if ever) and they will need to pay fair value.
Just consider and discuss with your solicitor or other provider of conveyance services when the time comes !
Also, cost of any/various surveys will almost certainly be a small fraction of your total conveyance fees.