They are very low standards of work and over priced
Come to Thailand for a year and then see what is involved with the thai immigration and the people who live here and have a good look around the country before you decide on the place where you are moving to full time
if you have the money to have some help with this you can use a visa company, I believe that thai visa center is a good one to help you it will cost about
If you are going to apply for an retirement visa in Thailand you don't need the medical insurance, but that's up to you as you can use the government hospitals, you still have to pay but it's a lot cheaper than private hospitals you have to pay 25% more than the thai people, as for your opening the bank account its been more difficult now you will need to go walking to different banks and ask them take a thai friend with you go looking smart and be very polite to the staff who you are dealing with good luck
Do it now then you will be ready for your new visa application,
Take photos of every page including blank pages in colour two copies, then book the appointment you can Google the address in Bangkok just goggle renew passport in Bangkok and you will see the info