I am reading about the LTR and financial commitment. Assuming Inmajr between 40k-80k $US.I must invest $250k US in Thalland. What about Thai bonds are they good? What other options-?

Hello friends, have a question about the LTR visa - specifically the "High income foreign individuals" category, since I am under 50 and don't qualify for the LTR Retiree option. As far as I understand, there are 3 main requirements - $1m+ net worth, $500k investment, and $80k/year income proof for past 2 years. I meet the 1st and 3rd criteria, but I am confused about the $500k investment, and would like to hear from anyone who has successfully used this option. Do you first make the investment, and then apply for the visa? And if so, is the Thai bonds a safer way to apply, compared to property investment? My concern is that after putting $500k in property, what if the visa is denied? Would it be safer to put $500k in Thai bonds, and then once approved, can I use that money to buy property? Thank you in advance for your time!