Longer answer –
Most shopping carts like EDD EasyDigitalDownloads allow for the use of multiple payment types at checkout. I recommend STRIPE as the primary gateway. This prepopulates the chekcout with a space for the buyer to fill-in their CC details and reduces checkout friction.
If you also activate another payment gateway in your shopping cart settings, in this case PP, you can chose to make it a second payment option on the checkout page. This is optional of course and doesn’t have to be done. There is some research suggesting that having both available does increase conversions.
Shopping carts like EDD and WOO are designed to sell set price products/services not for doing proposals or estimates and then invoicing or billing customer 1 off.
Paypal is a good option for this type of sale. Caveats: Different PayPal account types have different features like subscription payments, and whether you can accept CC from customers who don’t already have a PP account.
But yes keep you PP account even if you just use it for your own purchases.