u/Such-Post-418

I feel like this was asked here before but I'm not sure so I'll keep this simple

I have a Cash account and I don't really plan on investing more than I would deposit to my account. What annoys me tho is the fact that when I sell something (just sold ETF) to buy something else I have to wait few days for cash settlement.

If I switch to margin account just for this sole purpose (so I don't have to wait for settlement) but otherwise act as if I had cash account (only investing actual deposited cash), would there be any risks or fees or something to be aware of?