We are in the fairly unenviable position of having to let out a house and acting as landlords, without even getting any of the benefit in rent!
(Short story is that my MIL has dementia, we recently moved her to an assisted living rental closer to us, and as of two months ago rented out her old house which she owned outright in order to meet the fees for the new place - all proceeds go to her, but we manage the property on her behalf.)
It's been a hassle, and I wish we'd just sold it! (Which was what I wanted to do all along, but OH in favour of renting for the foreseeable.)
We had spent about £6k (of her savings) to renovate the place (sorely in need - had been much neglected, as we attempted to "firefight" the more pressing manifestations of her illness), but still on renting it out had a series of complaints that x y z wasn't working as it should, and had to fork out yet more of our own money to repair... Relations with the tenant somewhat soured as a result, which was the last thing we ever wanted (quite keen to be "good" landlords, but inexperience here caught us out).
My advice is to check EVERYTHING before you rent it out - plumbing / heating in all rooms, washing machine, back door locks not jarring, windows open and close properly etc. I wish wholeheartedly we had made sure to check absolutely everything in minute detail earlier, but as MIL hadn't ever complained and workmen hadn't pointed anything out, we didn't realise there were still problems on renting it out - so we now look a bit negligent towards tenant (who isn't the easiest of people - but I see his point).
Things are now all sorted, but it has put me off renting for life - too much stress involved, especially as I since watched the whole Channel 5 series of 'Nightmare Tenants, Slum Landlords' and now dread the day someone defaults on the rent or trashes the place in our absence!