How can I open a bank account and find accommodation in Thailand while on a Non-O Visa?

A user recently arrived in Bangkok on an E-Visa Non O, valid for 90 days, to accompany their child studying in Thailand. They plan to convert to a Non-Immigrant O visa and have questions about opening a local bank account to satisfy financial requirements and whether they need a long-term lease for accommodation. Responses indicate that it is possible to open a bank account with the current visa, especially if accompanied by a residence certificate from immigration. Community members emphasize that opening a bank account should be a priority, and also mention that short-term rentals like Airbnb might not meet the requirements for residency.