just to add to this Scoot flights Bangkok to Singapore are often quite reasonable and you can pay for a multiflex option which means you can change the flight date and time, but not route, multiple times for a low fee around $16 Aus which I have found to be a better option than a throw away ticket that you are not going to use
Check on the websites of the Thai Embassy or consulate in New Zealand. A lot of embassies and consulates changed their visa applications to being mail in only or online only, but there still may be places that allow for in person applications. If you have an NZ passport or you have residence status in NZ you could apply for tourist visas at the Thai Embassy in Wellington or the Thai consulate in Auckland. Have a look at their requirements on their websites
Get a 60 day single entry tourist visa from either the Thai Embassy or the the Thai consulate in your home country. Check out the requirements on your home country Thai Embassy or consulate websites. Often there are different requirements for the same visa required by differernt Thai consulates/embassies. It costs $60 for the SETV in Australia. As opposed to coming in visa exempt and getting 30 days on arrival, which you can extend at any immigration office in Thailand for a further 30 days, also giving you 60 days in Thailand at a cost of around 1900 baht and up to half a day waiting at immigration. Do the comparision with your home country consulate or embassy visa fee. Both of these options are simpler than a border bounce. Depending on where you are and how close you are to a border, the cost could be more or less than the two options I have described and could involve a whole day sitting in a mini van travelling to and from the border and at some borders now they require at least one night stay in the country you have crossed into. It is a good idea to have evidence of a booked and paid for onward journey out of Thailand either by air or bus. It is unlikely you will be asked by Thai immigration on arrival, but you could be. Less likely to be asked if you have a visa. More likely to be asked for proof of onward travel by the airline you travel into Thailand with.
I very much doubt that the agents putting 800K in people's accounts and getting questionable stamps from immigration offices out of town will cease or even be thoroughly investigated. I suspect it will be a case of increasing the 800K requirement to one million baht as has been proposed many times. That will make all involved happy ie visa agents, immigration officers receiving brown envelopes and many in government, including Big Joke's superiors
but why would you need to use an agent if you have the funds and can do the visa legitimately? People throw stupid amounts of money away ie up to 28,000 baht just to have someone sit next to them at immigration for an hour
I wonder how people ever got a passport to travel, if they can't fill a form out. Doing your own visa at immigration is no more difficult than applying for a passport in your own country. And I'd wager most did not employ an agent in their own country to fill out their passport application form