Please add a way to do customized estimate templates. This way I can select and offer different options for customers. This would be good to have pre built elements which can be drag and dropped just like form elements. I would also like for totals for each option to not add up at the end or be able to take away subtotal and total.

Please add the link to "Convert to Invoice" on the quick panel (3 dots). Currently this is only available when you open the approved estimate which some clients miss altogether.

Please add the ability to include the customer's business name under "Billed To." Also, please add the ability to make the country not required so that it will not show up on invoices. I only work with clients in the USA. Also, make the blue line and the website link a color that is associated with my branding.

Estimates needs to be as easy as Invoices. Currently Estimates are more akin to proposals where the user starts with a blank screen which is a subpar experience. You can reference how easy the UI/UX Houzz pro makes it for contractors to create an estimate https://www.houzz.com/for-pros/feature-estimates

Agreed.. adding margins is a standard practice for service based businesses.