Well I am from Luxembourg which makes renting a bot complicated but there is credit to your argument!You might be able to rent the belt locking kit from someone on here Kv6 cam locking tool
If not, you could buy a new one off Ebay and sell it on here for the purchase price less what you saved on not renting one.
List it when you are finished and leave the advert open then the tool only moves on to the next user, this halves the risk
of transit damage.
There is probably more to it than that but the idea of a tool-pool for expensive but infrequent use tools has mileage.
I'm looking for a code reader for a KV6 ZS-180, that is what brought me back from the wilderness.
I need to find out what has upset the CEL and get it MOT'd, then maybe its Cam Belt time