…くらいの…しか…ない => Only… at low level N2
Limit, limit
~かくして => thus... N1
Conclude
しばらく => for a moment; for a while; for the time being N3
もしくは => or; otherwise N1
Selection
~くらいで      => only N1
くらいの => Approximate~ N3
Emphasis on degree
くらい/ぐらい => approximately, about, almost N5
しかしながら => however, nevertheless N2
Things do not match the prediction
くらいなら/ぐらいなら => rather than (do …)​ N1
...し, ...し, ...から => and; and what's more ~ (emphasis) N4
Line up, list
Nくらい => about; approximately N N3
Emphasis on degree
どのくらい => how long N5