Currently run Clincher tyres on my alloy wheels and keen to pickup some Elite BWS wheels and use my existing tyres to start with. Then keen to have the option of tubeless in future

The wheels can be ordered in 3 options  - https://www.aliexpress.com/item/1005001670378179.html?spm=a2g0o.cart.0.0.47a83c00UMNrP6&mp=1

Messaged the seller who said if i choose clincher they can't run tubeless but if i order tubeless they can run clinchers also. Bit confusing for a noob like me! Are there any downsides to this option?

Lastly is the extra $100 worth it to go for a DT Swiss 350 hub?

Thanks