Not having chickens would be a terrible shame given you've obviously enjoyed keeping them.
The multi thousand dollar fixed position forever coop is a bad idea. I'm not quite sure why that type of chicken keeping is so heavily promoted. I know big walk in coops are convenient for the keeper, and in some climates where the birds are confined to the coop it's a must.
Provided the chickens have an adequately sized run all they need a coop for is sleeping and laying eggs. You can see on my coop page the types of coops I've built over the years. Back here in the UK I have a recycled plasic coop which I've altered which may be an option for you, but with 19 chickens, you would need two of the size you see in the pictures. It cost £500.00 and the extension and alterations another £300.00. We had a mite problem last year because the perches are made of wood, something I intend to change soon. Just with the perches it took a couple of weeks to get rid of all the mites but it's doable with a coop like this.
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