Yes, I am in Lisbon and my perspective is optimistic.I think that 2020 will be quite solid due to all the supports and subsidies from banks and government. 2021 will give some discounts and Christmas 2021 will be the turning point for RE to grow up again

I would go with a hail resistant 30 shingle then you get a discount from the insurance company .

Nope.. developers by and large are not going to cash you out and take the entitlement risk for such a small discount.. maybe 500k discount they would but not 100k.. not going to happen unless you find a developer that is not very bright and has money burning a hole in their pocket.

For one, the rental income tends to be lower than with short-term stays due to the necessary discounts, yet we still face most of the usual costs, aside from savings on cleaning and supplies.

Aside from the several Crypto debit cards out there that can connect directly to your Coinbase account (which you can use anywhere that accepts VISA), there are also services like https://purse.io/shop which allow you to purchase ANYTHING on Amazon, with Cryptocurrency, at a 5-33% discount. 

You could also look into a house cleaning service that offers a discounted first time cleaning.

If you will be purchasing materials those cards offer some discounts and in addition you can get pro discounted pricing on larger orders as well.

There are also discounts to other programs and products and the community itself is hands down the best of all the groups I am in.

They may want to extend for a year after the 6 months at a discounted LTR rate or it is simply a transition place while they look to buy, etc

The right property owner you are looking for is someone who are looking for long term stable income, don't mind take a little discount and maybe waive the first month rent if you can somehow convince them.