Is it wise to use a visa exemption for multiple visits to Thailand or should I apply for a tourist visa?

I am presently in Thailand for 6 weeks. My last visit was in March for a month. At immigration I was asked about my return ticket and asked if I have family in Thailand. I told them that I am just travelling around, which I am. I gave an Airbnb address and not a hotel which may have aroused suspicion. I am returning to the UK on 16th November and returning to Thailand again mid January for just under 60 days. The flights are already booked. I am planning to use the visa exemption once again. Is this wise? Would I be better applying for a 3 month tourist visa or would that be considered a waste of time and money? If I were to plan another trip in May next year would I be better advised to go for the Multi entry visa? Any advice would be appreciated 🙏