There are many international shipping and removalist companies and all should be able to provide a estimate of the cost if you know what you want to send and most can provide delivery to your overseas address.

Air freight will be quickest of course but very expensive.

Shipping by sea a cheaper option but very slow..

You need to contact some companies for cost estimates.

But as others have said take the bare minimum.

Check the Thailand embassy in your home country for Visa options like the 6 month multiple entry visa..

It's a much safer option and you can come and go without worrying about being denied visa exemption entry

Wise transfer works very well..

Good exchange rate and fast transfer to a bank account

Many more flight options out of Bangkoks 2 airports and likely to be cheaper..

My understanding is you don't need a visa for Phu Quoc however depending on your passport country you may need one to visit anywhere else in Vietnam

Keep in mind when calculating your departure date that your arrival day is counted as day 1 of your first 60 days regardless of the time of day you arrive

I am confident there will be a trial period for any new online application where they won't be enforcing the rules immediately..

Will it be a week or 2 or a month?

Who knows I guess and that may depend on how smooth the first few days goes when it's rolled out..

Don't be surprised if it's even deferred at the last minute which is also possible

My advice..

Do not deliberately overstay your visa exemption entry as this could effect future entry to Thailand.

Go to a Thailand immigration office and extend your visa exemption for another 30 days.

How often is at the discretion of the Immigration officer you are dealing with on the day you enter.

If in thier opinion you are not a genuine tourist and using repeated visa exemption to live in Thailand then you can be refused entry..

Once should be OK.

After that its a gamble until they stop you.

@Roberto *****

I don't believe that's the case..

You should be able to leave to a neighboring country for a 2 or 3 nights and just re-enter Thailand for another 60 days..

The only thing I would say is don't expect to just keep doing that several times consecutively as at some point in the future the Thailand immigration may question you about being a genuine tourist and could refuse entry if they believe you are trying to live in Thailand on just tourist excemption entries.

@Roberto *****

I have Australian passport and got free visa entry from memory so I expect US passport is the same..

Plenty of budget hotels around the $20 to $40 US price in Georgetown..

Check out Agoda hotel booking website or App