That being said do you think this still puts an unreasonable timeframe around making our first purchase?

As the market tightens you may find it harder to meet your criteria, but unless you're being really unreasonable (and your agent will tell you, if you are) then you're probably wise to stick to your guns.

HOWEVER, I would very much like to be proved wrong on that one. 90 days is an unreasonable restriction in my book, I'm all for flipping houses faster!

b) Landlords cannot just raise rents to unreasonable levels...why?

Remind them that you are not trying to be unreasonable just trying to make sure the mortgage gets payed because the bank doesn't care if your car died or why you couldn't pay on time.   

As far as ten days, that is not unreasonable and much better than  the unlicensed FRAUDS AND SCAMMERS asking for 30 or 60 day "inspection period" while they are trying to find a legitimate buyer. 

I don't think that's unreasonable.

If an investor wants to submit an offer at 80% or even 90% of list, and that list price is properly supported by the comps, we are wasting our time.There are times when the list price is just unreasonably high and 80% can make perfect sense, but that's by far not the norm.Likewise, if the property is listed on MLS I'm especially reluctant to submit "creative financing" offers. 

So maybe a 3-year return is reasonable one year, but unreasonable the next.

A lot of the potential sellers I meet with lately are very unreasonable about their asking price vs the reality of the condition of the property.