Yes there is parking on the side of the roads in the site and several car parks, but you can't 'change' passports there or did you mean transfer your stamps?
if you don't get the non o in your country, and fly in exempt, you will also have to buy an onward ticket as well as paying an agent to purely help open a bank account.
you will have to employ an agent to open a bank account for you, which will need to be seeded for 2 months with 800k before you apply for non o in country. Cut the agent out of this part of the process and do it before you leave, using 800k in your home country account.
Step 1 get your non O via e-visa from your local embassy before you leave. Step organise your initial stay before you leave, (a seviced apartment might be best, like a hotel bbut designed for longer lets and has all the comforts of an apartment. Step 3 visit Imigration get a resients certificate and open a bank account. Step 4 with a letting agent ( or without find a condo).
your lucky, we've had our scb account locked, although it may be part of the new banking standards introduced a couple of years ago to negate money laundering. I read a report the other day around 10's of thousands of dormant accounts had been deactivated in the last year in Thailand as part of the laundering crackdown.
sorry i cant give a definitive answer on that as we live in a house we own. But that sounds adequate.include a tm30 and tm7 receipt to show your tied to the apartment.