I started full time wholesaling with a spreadsheet and raw data. I would hand dial everything or even door knock. Now I have more software than I can keep track of. Here are my favorite ones:
Deal Machine:
Gsuite: Its just gmail for biz. This eliminates all zoom, docusign and other software's you are paying
You do not need anything else to run a successful wholesale biz. Maybe a spreadsheet or a crm but I have yet to find the perfect one!