A finance lease allows you to use equipment as you pay for it in instalments over the period of the lease. At the end of the lease you own the equipment, either because you have paid for it in total via your payments over the term of the lease, or by making a residual payment, which is set at the beginning of the lease. 

A finance lease is a good option if you will be using the equipment for a long period of time, typically 10-15 years, and are not likely to want to upgrade regularly.

An operating lease allows you to use the equipment as you make regular payments over the period of the lease. At the end of the lease, you typically return the equipment to the supplier. In this respect, an operating lease is like a straight rental, without ownership at the end.

An operating lease is ideal if your business uses equipment which becomes obsolete quickly, because you return it at the end of the lease. You can then upgrade your equipment if you wish. 

Equipment rental is in essence a short-term operating lease. As the name suggests, equipment rental allows you to rent and use the equipment as you make regular payments over the period of the lease. At the end of the lease, you simply return the equipment, and have no ownership rights.

Equipment rental is most suitable for businesses which need assets on a temporary basis, but have no desire for ownership.

A commercial line of credit is similar to an overdraft, it is not a form of lease or rental. A commercial line of credit is in essence pre-approved funds, which you can draw down as needed. You will pay a fees for access to a commercial line of credit, and interest on any amounts you draw down.

A commercial line of credit is suitable for businesses which have on-going equipment and technology requirements, particularly if these requirements are likely to change regularly.