Could I pay TDY Rentals in full so as to streamline things and submit only one reimbursement voucher for the entirety of services rendered?

It certainly would be convenient! However, while you could remit a collective payment to us, your restriction would be the inability to claim reimbursement for future TDY dates (e.g. someone cannot claim TDY if the TDY hasn’t occurred yet); therefore, you could only submit a reimbursement voucher for the duration beginning on the TDY commencement date until the current day at hand.