I’ve learnt to arrange to have repairs fixed immediately these days. Penny-pinching over every little thing costs time and energy. Rather than spending an hour trying to arrange for more quotes (and letting the repair continue to deteriorate, costing more to fix) trying to save £20, just use your normal contractor and get it done.
You’ll recoup any forfeited savings in Tenant-appreciation, peace of mind, and also save that niggling little stress that permeates throughout your day/week.
Build your ‘property power team’ and use them. Remember; property is a long-term investment so don’t be short-sighted.