Should I price the land 2 times above market value and offer a low interest rateORPrice the land at current market and use a very high rate?

I have seen this range from as low as $100 up to $300.Do I need to pay anything before sitting at the closing table?

I would look for a low interest line of credit to put on the property and lend at a higher interest rate.

Yes, Spain has a wealth tax but it's above €2 million taxable income and the rate is low so it's not going to kill you.3.

Even though there is low inventory, interest rates are high, and many properties don't cash flow, look harder there are always deals, you just need to find/make them.

There are quite a number of things that can make utilizing an FHA loan more difficult such as more barriers during appraisal, appearance of low qualification/little cash, typically longer closing period, likely higher interest rate, and PMI cannot be dropped without a refinance if 3.5% down.That said, just chain 5% down conventional loans, and make sure your duplexes pay for themselves.  

House hacking a duplex is a solid way to get started in real estate while keeping your living costs low.

If my target would be low income residents, are there any grants, tax credits, or funds available to help me with the conversion? 

Most of my CFO clients that are in residential development are looking for IRRs (usually over a minimum 5-year period) in the high teens and the commercial developers are looking in the low to mid 20% range.

Low vacancy rates, rising rents, and high tenant demand for more space/good school districts.