@Da***
, you can drive to Mukdahan (the city on the thai side of the border) but I don't think you can drive into Lao. Someone will know though. Believe me it's not that bad taking an Air Asia or a Nok Air Fly-n-Ride from Bangkok to the Indochine market in Mukdahan, then crossing the bridge into Lao.
I thought you were complaining that Savannakhet was a long way to go :O ;) :)
The only other consulate in the area that will sell the year long, mulit-entry Non-O based on marriage without showing funds is the thai consulate in Ho Chi Minh City Vietnam.