Say a piece of hardware costs the company £1000, we can assign that as a cost in the inventory, but what if its on "Rental"

We should be able to right the cost of it down over the period of the rental

For Example, We rent it out for £75 a month
We should be able to assign a percentage or fixed amount off the "cost" price

so by the end of the contract the cost price of the equipment has gone from owing us £1000 to the new amount. reflecting the usage of the item.

Also Say there is costs associated with this contract (repair costs in labor or parts) we should be able to add them onto the "costs" of the recurring template to right then off over a period of bills

Second part of this is, We design a contract for our customer based on an annual cost :

Server Rental: £1200
Support: £999
Installation: £300
Total: £2499

Customer ops to pay this monthly, rather then having to work out a percentage interest and split it over 12 months, we should be able to do this automatically

in my head you would click "Make Recurring" - drop down option - "Split over period"

Then choose how many months, what percentage or amount to add on monthly and wither a deposit is required on the first invoice generated by the recurring template