Yes i think its a visitor visa, fundamental to you being successful is you have to demonstrate that she intends to return to Thailand, so things like a letter from her employer, property she owns, money in the bank. that type of thing.
there are a few things to consider; if you have a Thai bank then you can do it in Thai (800kthb in the bank 2months before) if you have no Thai bank you need to get it in your homecountry (90day non imm visa) when you get to Thailand you can extened it for 1 year
I've just had a look and I've linked my credit card to be able to "Pay" so if there is a shop that doesn't accept a credit card but they accept TrueMoney you can use it and charge it to your credit card. I might use it a little more.