It’s no different to buying any business , I bought some work 6 years ago to add to what I had and it’s proved an excellent investment, but had viewed couple rounds before that were not great , words like text them the night before or been established 6 months are for me none starters , I ve had customers 20 years and they all know how payments are made , it can be very profitable window cleaning but takes work like all businesses to get there ....