Hi, I’m Chris. I’m the guy who’s done a lot of the lights, particularly in the canton/patterson park/brewers hill area. Most of my customers provide options for collecting payment. Venmo/Zelle/cash/check. Just keep a spreadsheet of payments and share it to something like Google drive like someone else suggested. Many people have a block Facebook group they communicate on or an email chain. I do a lot of estimates so I’m not sure if you met with me or a different company. I’m happy to give you an estimate if not. At 35-40 houses, unless we have to add our own poles to tie into, I’m generally in the $100-110/house range. Feel free to text me for anyone interested @ 410-241-4696.