The problem is that we would be taking risks and there are other costs some of which may be a challenge or may be can be deferred?

Lets start the process here and you can follow along.

- The essentials.
2 panels.
1 micro inverter.
2 rails.
6 hooks.

£347.00

- The basic extras.
Ac cable.
Protection.
Connection.

£152.00

- Other stuff
Admin.
Notice.
installation.

So we are at £500,  but the other stuff needs to be addressed. Administrating things can take a lot of time and add costs, for example a none payer with £75 court fees for recovery... The notice should be fairly straight forward as we can template that.

installation is not simple and there are the risks or danger here, and we have had people wire things wrong, even when they have videos, and manuals (with pictures) as well as being told. Under UK regulations a home owner cannot add a new circuit, and you cannot be sure that you can "tap" into one that exists or that the tests and commissioning is carried out.

Now lets move to the solar panels. if they are on a low roof then the risk is lower, but the cost of scaffold is costly and most people wont want to install or have the tools to install let alone the skills (experience) to install roof hooks and providing weather tightness. this could be considered a "bit of a issue".
It does make me wonder if we try something else? roof/ground tubs?

Tubs tend to be costly. but in respect of scaffold hire they may be a lower cost option. I think we may offer A frames....

The Pros:
Rental of solar means that there is no big cost or risk.
Its installed as a temporary system.
We deal with the paper work.
Aside from the retainer there is little cost (£220+ installation)
If solar doesn't work, you can return it.
You can buy the rental and have a discounted price.

The Cons:
We are only offering a 800w and a 1600watt grid tied rental.
You still have to pay for the installation,
Its grid tied and has no battery options.
Only a 4 month rental.

The idea is that we provide the solar hardware and come and install the hardware, there is a fee for this. you then rent the solar hardware at £20 pcm, but you can only rent the hardware for 4 months, when you can decide if solar is for you or not. If you buy the solar the rental and retainer is taken off the cost, and the permanent fixture installation is undertaken.

The power generated is around £1.45 for the 800w per day, and the 1600w about double. the actual value will depend on the position of the panels and the weather. but it should cover the rental costs.