The base will be low year one for Suh. Just like Calvin's 120 million deal was really low and Stafford. Suh will get a big bonus, but that is spread over 5 years at least (or life of contract if less). There is a way to sign Suh.
Here is JJ Watts deal with only a 10 mil signing bonus and year 2 10 mil roster bonus. Other than 2015 not bad. 2014 picture that plus 9 million due to the resturctures. So that would 13 million. Which is what Suh's number is counting in 2015 right now. So still 20 million under the cap in 2015. I wouldn't go with the roster bonus method.
2018 and 2019 would be about 10 million higher each. And that's worst case Watt money scenario.
http://www.spotrac.com/nfl/houston-texans/j.j.-watt/