What are my best options to have my Thai Girlfriend visit the USA?

We have explored the B2 option, as well as the K1 option.

My concern with B2 is that she wont get approved. She has only worked at her job for a couple months, rents an apartment and isnt really heavily grounded to Thailand.

She doesnt have a lot of money.

With the K1, I think its just the amount of time it may take. I feel like this is the best route, the most honest one.

She feels like the B2 would be fast and she could change the status later if we get engaged.

What do you guys think the best option is to bring my Thai girlfriend to the USA, with the eventual plan as marriage, and to reside in the USA?

Im also considering a service like easyfiancevisa to help prepare paperwork and speed up the process.

Plus, how long can I expect it to take?

and yes I have read some previous postings on here and other sites.

I think the K1 option is the best for you if you plan on getting married and remaining in the US.

The chance of getting a visitor visa with your GF's employment record and etc. are slim to none.