Dear Alex,
First of all, excel is prone to errors. If you want a fast and reliable accounting reports, I suggest you to use an accounting software. Besides, UK's HMRC mandated to use an accounting software before the year 2020 as per HMRC's Making Tax Digital. Excel will give you a bunch of manual jobs which will cause an increase in labor and prolonged outcomes compared to a cloud based accounting software.
Secondly, since your sales team needs to send an estimate to your customers, some cloud based accounting software like QuickBooks can help to do this job for you. Even payroll, paying of sales tax, reconciling your bank accounts and many more. I'm a certified QuickBooks online ProAdvisor, I can discuss this to you further.
In addition, I have an advance knowledge in excel. I can do this job for you if you really want it to be done in excel. I've been using it for more than 10 years as part of my day-to-day tasks and I underwent some online courses to improve my expertise.
I have 10 years solid experience in accounting/bookkeeping as well, including but not limited to: accounts receivable, accounts payable, accounts reconciliation, payroll, taxation and financial statements. And lastly, I'm a financial analyst, I can help you to interpret your business.
I would love to discuss this opportunity with you further the by chat, email or phone. Please don't hesitate to contact me and I would love to hear from you.
Best regards,
Roseanne Violenta