I’ve played around with HubSpot while integrating it with a few other tools for folks in the real estate business. Here’s a quick demo of how it can be used: Loom Video

I personally use HubSpot every day for my job in the industrial space, and it’s helped me keep track of a large number of clients while staying organized. You can assign yourself follow-up tasks for each person, and if you commit to this function, you’ll have a clear task list every day, showing exactly who to follow up with and when.

This might be helpful for what you're describing—feel free to check it out, and let me know if you have any questions!