My repeated experience as a tenant was that agents were an expensive waste of space who just passed messages, unreliably, rarely got anything fixed and expected me to take time off work to oversee the workman if they did, so I've never used one as a landlord, at all.
It does depend whether you have time and the inclination to deal with things yourself. It's perfectly compatible with working full time though, especially if you're nearby. Few things are really urgent, most just require a couple of phone calls to get someone round to fix something.
You could certainly use one for your search. They will do credit checks, which you probably can but not sure how easily. I always checked references (previous landlord if poss, current one will be desparate to get rid of bad tenants), took more than a month's rent as deposit (to discourage absconding without paying final months rent) and, went on my 'gut feeling' about whether people were ok or not.
I learnt to trust that after not feeling right about someone - the lesson is you may not know why at the time but you will find out. Communication is key, you need tenants who will tell you about things before they go too far wrong but have some common sense, so don't bother you constantly with nonsense.
Do the sums, allow for replacing something like a shower or fridge (if you're including white goods) every year, plus minor repairs, gas cert etc. Also build a contingency fund against the big things; boiler, roof etc. Remember unoccupied periods. Don't forget tax and learn how to calculate it - read the guidance notes carefully and ask questions of someone knowledgeable.
- Ask agents about the quality of their inventory (pictures a must) and how well it stands up to deposit disputes.
- Will they be able to advise you on bringing your house up to standard e.g. If any fixtures or fittings don't meet current building standards and could be considered dangerous.
- How often do they inspect.
- What problems have thy experienced, how have they dealt with them, how long to evict non-payers, how much rent lost.