You might want to try stimulating your circulation before being tied as it sounds like you have a very bad circulation - do you get cold feet and hands a lot?

Can't really say if your tingling/numbness is a bad thing or not without experiencing it as there are degrees of this. So I would still be wary about suggesting that it is 'ok'. Certainly the major signs you need to look for are colour changes.

You could try looking into some shibari techniques and see if there are any methods which allow restriction without this effect - loose ties but still difficult to move or wriggle out of. There may be some if you look. Also, perhaps flat ties of some sort instead of the round ones?

You say leather cuffs are out of your price range but have you considered PVC ones? You may be surprised at how cheap you can get even leather ones if you shop around.