On step 108 Investment potential does not show on the new lead information page. Went back and re-did the steps but it still does not show up.

Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, uninstall Max's Pitch Package, etc. That can make it worse. There's a 95% chance the same snag/fix is listed & answered in the Help FAQ. But if you can't find it there, post your problem here.
Make sure you post in the right category below & be sure to include a screencap showing the issue!
Ok, so what I hear you saying is you're sure you created the field Investment Potential in Steps 25-29, but it's just not showing up here in the form to create a record. To be sure, go to Setup > Object Manager > Lead > Fields & Relationships and confirm that you see Investment Potential there. If not then you need to do Steps 25-29. But if it is there, then click on it, to see its details. Then, click the Set Field Level Security button in the upper middle. Then click the check box at the top of the column labeled "Visible" once or twice to get all the checkboxes below checked (and blue). Then click Save at the upper middle.
When you go back to the form Investment Potential should be showing. If it's still not there, then get back to the Lead object page again and click Page Layouts instead of Fields & Relationships. Then click Lead Layout, NOT the Lead (Marketing) Layout or the others. After you open Lead Layout, Investment Potential should be at the top panel. Drag it down into the layout below, underneath Bay Area Location, and drop it there. Then click Save on the upper left. Now when you go back to add a lead, Investment Potential should show up.
Let me know, ok?