‘The Bills need about $5.5 million in cap space for their 2013 draft choices. They need $6.8 million for a franchise tag to retain the rights to safety Jairus Byrd. A tender offer for restricted free agent David Nelson is $1.3 million. Those costs total $13.6 million. How much space do the Bills need to do their free-agent shopping? Two top-flight starters would cost about $7 million or $8 million in cap space.’