For 3.5 gallon at 1.030-1.040 (the latter one being better), one smack pack of WY1968 (within 2 months of manufacturing date) should suffice. Use a whisk to beat some air into the wort right after pitching. Jeez, most starters are 1.040.
Or make a starter 2 days ahead of your brew in a gallon jug by swirling as often as you can for 24 hours. Save half the yeast out for the next batch. Also, harvest the yeast from the 3.5 batch and use 1/4 to 1/3 of it in your next one.
Agreed on the low gravity, make it 1.040, at least. Also the 1 pound of crystal looks like a real lot to me. Cut it in half.
You can always add DME powder to get to the higher gravities in between before opening another can of LME. Many kits are built that way.