Don't leave white goods , you'll have to replace them , according to our agent
This is the 2nd place I have moved into with no white goods and to be honest this is so much easier for us, washing machine breaks, its up to me to fix it, I don't have to wait around for the landlord to try and sort it out. The only thing my Ll has to deal with is the boiler and other things such as smoke alarms to check they are working for certificates.
I would also say if you rent to anyone on UC, you can request that they ask you to tell the council to send it directly to you, they might not do it, but over lockdown it meant at least one bill was being paid on time.
On the landlord side, don't rent to anyone you know, or anyone your friends know. It will turn ugly at some point.
Pets I am always in two minds about this, I have pets myself and was lucky to find somewhere to rent that would take us all. But also I understand that it is a pain in the arse for landlords. If its no pets, say no to all pets.
My relative (LL) was dead against cats and dogs said yes to gerbils, was fine till they escaped and found the wiring.
I think you can only go by your experience as well, its a massive learning curve. Make sure everything is in writing judge Rinder