I absolutely agree that EV conversion companies are charging way to much, effectively limiting this kind of conversion to the super rich, where they are converting prestige vehicles.
I see nothing wrong with a DIY budget EV conversion, as long as it is done sensibly and methodically, there won't be an issue.
Range (or lack of) is potentially the most important issue with any EV conversion, not just for the DIYer, but also for the professionally done conversions.
Many conventional ICE engine cars simply don't have the space for the batteries, unless extensive body modifications are done. This is one area that the FL1 is at an advantage, as there's plenty of "wasted space" in it's design, which can be utilised with only minor modifications to the body.
Batteries is an interesting, complex and likely expensive issue.
There are a few battery chemistry options available, each with benefits and drawbacks.
Lead Acid (Pb) for instance is has quite a few benefits, but just as many drawbacks, which means it's not ideal for a long term power option, however I believe Pb to be an ideal concept testind power source, simply because it's easy and relatively cheap to use.
Then there are the Lithium based batteries, which are best as long term power source. There are a few different types of Lithium battery, again all having benefits and drawbacks, but the main drawback with all Lithium battery technologies is cost.
Looks to be coming on just fine Ali.
You'll be needing that coupler soon I can see.