A chanote (deed) or other property purchase documents are not a normal document to show for proof of accommodation. When staying in a private residence (presumably even your own), you must submit an invitation letter signed by the homeowner confirming the dates you are staying there. Simply write a letter saying that you are the condo owner and confirm that you will be staying for X dates. Include a copy of your blue book that shows you are the owner. If you bought it in a Thai company structure, then write the letter from the company, assuming you are the company director, and sign on behalf of the company.
If you don't have a smart TV, any android box will include all the usual streaming service apps, or you can easily download any missing apps like Amazon Prime Videos, Disney Hotstar, etc. Unless you are asking about the illegal services that give you pirated access to streaming channels.
Both PEA and MEA bills can be accessed and paid through the apps for each company. It's easy to add your meter to the app by entering the reference number and account number from a recent paper electric bill, then you can always view future bills on that meter in the app and pay by credit card, online banking, or using the QR code in the app to pay at 7-11.
Promptpay / QR scan payments are becoming the most common way to pay. Every single shop, food vendor and service provider accepts payment this way, and for many people, they may use QR scan to pay dozens of times a week, and only use cash once every month or less.
You're confusing the 90 day validity period for the visa with how long a stay it grants. Single entry tourist visas are valid for use to enter Thailand once within 90 days from the day it is granted, but only give a 60 day stay once used to enter the country. You can extend it one time for 30 more days at immigration offices within Thailand for 1900 THB.
you clearly don't know what Thailand calls its various entry schemes. Visa on arrival and visa exempt entry are entirely different things. Visa on arrival is required for less than 20 nationalities, where they must PAY for a visa on arrival into Thailand, which grants only 15 days stay and is not extendable. Visa exempt entry is a free entry available to about 60 nationalities, granting a 30 day stay, which is extendable for 30 more days.
You are confused about Thailand's different entry schemes. USA passport holders qualify to enter via either a 30 day visa exempt entry (no need for a visa) by just showing up, or with a 60 day tourist visa granted in advance from a Thai consulate outside Thailand. If residing within the USA, the tourist visa can be applied for online via Thailand's e-visa website. Either the 30 day visa exempt entry or the 60 day tourist visa can be extended one time at immigration offices within Thailand for 30 additional days. Americans don't qualify for a separate entry scheme called visa on arrival, which some nationalities must use, where they pay for a visa when they get to Thailand, which grants only a 15 day stay.
Lazada has official brand shops for most retail brands. If you are worried about counterfeit SD cards, buy them from Sandisk Official, Kingston Official, or from the major electronics chains' official stores on Lazada, such as Powerbuy or Banana IT. Considering the frequent coupons and sales, it makes no sense to have such items sent from overseas when the actual manufacturer has direct shops on Lazada. Same applies to many other consumer goods brands. Just type a term like Sandisk Official, or Colgate Official, or other such term, and Lazada shows you the official store in their results.