the "visarun company" at least will be a guarantee that you will get stamped in for another 60 days. They will always check your passport before taking you onto their tours. If the company sees by your passport stamps that your chances are nil, they will tell you. If you do the trip by yourself, be warned! You save nothing money wise, on the contrary, if the Thais won't let you back in, you will be stranded in Cambodia
you either book the "visarun" company tour in Pattaya, or you try to do the border run all by yourself. You have been warned that you should not even attempt to do a border run in Poipet/Aranyapathet. They will scam you! There is no agency in Aranyapathet that will help you with the needed service
well, if you have a U.S. passport, you will get stamped into Thailand for another 60-days stay permit. The two visa-exempt entries are definitely possible for two times in a row. The 7 days your fiend mentioned, is an extension refusal being issued INSIDE Thailand, not at the border. After so-and-so many days inside Thailand, when an Immigration officer thinks you have misused the touristic entries for a longstay, he will refuse to issue another extension, and stamp you "application denied, you have 7 days to leave the kingdom". Your friend simply confused two different things
on a U.S. passport you will get a 60-days stay permit stamped on a visa-exempt entry. No visa and definitely no visa-on-arrival. . . . . . However if you can do this on the same day, is unclear. Some travellers have reported that you will need to stay in Laos for 2 nights before you are allowed to exit. . . . . . and don't forget, you will need to buy a Laos visa-on-arrival when entering Laos. The fee is 2000.- THB or 35-40 U.S. Dollar (crisp & clean banknotes) and you will need one passport picture
well I can only tell from personal experience. In 2019, at the age of 61, I fell ill with a lung emphysema. I went through 3 hospitals (Eesan town government hp, then private hp in Ubon Ratchathani, then VIP hp Samitevej in Bangkok, one Medevac flight from Ubon to Bangkok included. After 27 days I was relocated to Germany, accompanied by a medic, in the business class of Lufthansa. My "ADAC" (German Automobile Club" insurance "Foreign Longstay Helath Insurance" paid next to 50.000.- Euro for everything, and they fronted the money, I only had to pay 20.000.- THB in cash immeditaley, when delivered into emergency, for the first three days in the government hospital in the Eesan, or they would not have started treatment! What I want to emphatize is, it's worth to settle with a WORTHY insurance. The cheapest ones are not always the best ones. Y'all know, ya get what you pay for. At the moment I pay 868.- Euros for a 6-month Insurance. By next year, due to age, I will have to pay 1260.- Euros. Another lung emphysema, however, will not be covered. . . . in your situation, if you feel healthy and stable and fit, you could wager the option to stay self insured - if you are willing to front a hospital bill of 1 million Thai Baht at the utmost, plus a medevac flight back to the UK
this really is up to the Immigration that serves your area. If this Immigration officer told you that you can't apply for another time, then I would take it for granted. Leave, go back to your home country, and come back anytime next year . . OR: just try your luck, exit and re-enter visa exempt, get stamped 60 days and visit Immigration and see what they will say. It's win some lose some