@Randy ********
STV was designed for snowbirds who come to Thailand every winter and have a condo or long term housing already planned out each year. It's not ideal for someone who wants to travel around the country.
There's not any workarounds because you have to prepay and show proof as well as the tax ID and documents from the booking.
Only other option is something like a multi entry tourist visa (if your embassy offers it, many do not currently) or leave after 90 days and get a new tourist visa and return. Both ways will require leaving and coming back to get your fresh stay.
There's not really many places in the world you can just freely go on holiday and live for 6 months.