I have pros and cons for both plastic and clay pots. I notice that gardeners on this forum use clay pots almost throughout.
Plastic pots are used in RSA because it is lighter to carry around due to climatic changes for different seasons although a small percentage of gardeners grow to my extent. The plants will not last in your hot climate and the roots will cook. Plastic pots do not dry out as quickly as clay pots.
Clay pots are used more for decoration in the garden or on patios and around the pool area where they remain all year round in the RSA. Clay pots may work better for your hot environment because it will probably not get as hot as a plastic pot so the roots will not "cook". Clay pots are extremely expensive here. My hobby would never have extended to what I have now due to difference in price. Clay pots dry out much quicker than plastic pots so water is needed more often. Clay pots gives superior medium cooling due to porosity of the material if it is not painted.
To summarize, I will use clay pots in your country for the sake of the roots of plants. If prices were similar to plastic pots I would use clay pots throughout here too. The difference for example of a 20cm clay pot and a plastic pot here is that a clay pot is about 10 to 12 times more expensive than a plastic pot. The larger the pot size the more expensive the difference becomes. Keep in mind that I have over 600 pots planted with bulbs and about 2500 pots planted with Clivia plants in my shade houses. Here is a photo of my largest shadehouse with 6 racks similar to these in the photo. Those are 16.5 cm pots and 240 on a rack.
This is the two small shadehouse where 150 pots are housed per shadehouse with seedling Clivias of under 2 years old.
The third shadehouse holds 600 pots and then there are many pots around the garden also planted with Clivias like the photo below.
