First of all,thank you Patrick for your caring!
I ll try to answer your question in order.Before start doing that,just want you know that could only read some parts of the link about your experience you sent to me.The kiln I want to build is downdraft kiln because am considering that would be able to accomplish it for the reason of material I would need only insulation bricks(JM26),burners and iron rod for construction.I dont think that would need anything else at the first step cause as an example ,even temperature indicator is not a must at first thanks to firing chart helps me to understand with colours as you know either.
I am writing all these things cause really got small budget(1000$) and have to use it efficiently.I can even order bricks and burners from Alibaba if I can find safe company.Anyway,for the next question,I really had less knowledge which one will be better for me,propane or low pressure gas?But I ve been planing to build it inside a building such as a garage or studio in an industrial area after design will be done.So,at this stage I need some information from you and maybe others..
Answer of personal or commercial is basically both of them.I want to focus on some project which would lead me financially and then jump back to my dreams.For this reason,I think 1m3 will be ok at least for beginning..And l can understand last question about size of shelve when look at it from professional perspective but believe me when I was at college,it used to use even broken pieces of refractory sheet,you know what I mean.But of course its important to consider it before start building and I leave the link of easy accesible to me(https://www.refsan.com.tr/firin-rafi-delikli-5956)
And lastly,why I dont buy a kiln instead of building is totally about financial cause very expensive and unnecessary to pay those numbers!Before I stop this on here,I want to add one more thing is that wondering should be better to focus on an electric kiln for me?I also think this before but dont have sources how to build it.I only have some parts of Frederick Olsen's book..
Anyway,I will be around here and looking forward to having advices from you Patrick and others who would love to help me!
Greetings from İstanbul..