You are probably aware, but if not John Fedrow and Kevin Bump have great MHP podcasts on iTunes.

The Irish property buying process is probably very different to the UK but I can recommend a few books and Youtube channels for you to have a look at : Search for Rob Dix on Amazon and read his books : The Complete Guide for property investing, Rich Dad Poor Dad (which I am sure you have already read) and on Youtube: monoperty.I also listen to the Propertypodcast  http://thepropertyhub.net/podcast/on itunes and also the propertygeek podcast too.You can find great free course on the property hub also:http://thepropertyhub.net/property-courses/I am so excited about investing in property, my goal is to quit my job in 6 years and start flipping properties full time - buy at auctions, refurb and sell!

I don't have the setbacks handy but I think it's 100 to a water source and 50 feet to another waste area. depending on the shape of your lot these setbacks could make it un-build-able. 

@Jason Ma I recommend that you find a few of Brandon Turner's recorded webinars in the BP archives covering the topic of deal analysis.  

If HUD issued the guidelines (these are usually available in their website's archive), this isn't an overlay.

Yes, you can check the zoning archive online and if there's an APPROVED application for a 4-plex, likely you're fine.

They are produced weekly and you can find the old ones on iTunes.  

Head over to the multi family forums and spend a few hours going through the archives and you will answer many of your questions.

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Oh well, I'm hoping it will be available in the Webinar replay archives.