I have just received my non-o multiple entry visa based on a Thai spouse in HCMC Vietnam. Everything is very well laid on on their website for the requirements and the fee involved. No proof of funds required. For drop off yesterday I was 3rd in line and was out in 5 minutes and for pick up this afternoon I was 3rd in line and out in 1 minute. For those that live in the north of Thailand like myself, HCMC is for sure easier and faster to get to than Savannakhet, however slightly more expensive. Overall great experience.