1) Did you buy them to Flip to another investor just like people doo with 4Ls? Then don't renew them.
Right now there are 42000 deleted 5L.cos on expired domains. Let your join the use the renewal money to start afresh
2) Are they Brandable? It is highly unlikely they are because brandable 5Ls are hard to come buy for reg free or uncontested drops. if they are, you can try to submit the best few names to Squadhelp and see for another year but based on how I feel your names are they are unlikely.
3) About being patient. That is highly misunderstood.
if your carrying cost is $2000 every year and you don't sell 1 domain in the first year, your carrying cost is $4000 in second year, so you will need to sell 1 name in second year for $5000+ to make a little bit of profit after commissions.
If you buy 1000 random names, one of those might sell, but it doesn't mean your patience paid off. Eveyr name will sell, but at what STR and what PRICE and will it give a profit? It is simple Math
Cut your losses Fast and focus on buying better names
Good luck