from a cap perspective, depending who who you believe (Sportrac or OvertheCap) -- the Cards have between $2mm - $625k or so
they have a few levers that are within their control to pull:
cut Gilbert for $925k in space
cut Kennard $4.2mm
convert salary to bonus on DHop, Budda, DJ Hump and J Phillips can provide up to $20mm
this is plenty of space to finish building the roster
then:
with the first two picks -- they need some combo of an offensive weapon (TE, WR, RB) and a CB
maybe the Cards get lucky and one of the top offensive guys falls to them. Warren Sharpe's latest mock had Waddle falling to them.